Ventilator



Feb. 2, 1937. E. A. JOHNSON VENTILATOR Filed May 14, 1955 INVENTOR. 6mm.8%.

ATToizNEY.

Patented Feb. 2; 1937 UNITED STATES PATENT OFFICE VENTILATOR Ernest A.Johnson, Duluth, Minn.

Application May 14, 1936, Serial No. 79,651

4 Claims.

This invention relates to ventilators, and has special reference to oneadapted for use under a window or the like in the opening therefor, and

will appear in the following description thereof.

Referring now to the accompanying drawing,

forming part of this application, and wherein like reference charactersindicate like parts:

Figure 1 is a broken perspective view of the interior of the majorportion of one of the improved ventilators.

Figure 2 is a perspective view of a portion of one end of one of thelouvers.

In the drawing, I represents the central body portion of the devicehaving the upper and lower edges thereof turned at slightly more thanright angles forming flanges acUacent, said edges, the

lower one being indicated at 2 and the one above at 3. The latter, for ashort space centrally thereof, is turned again at right anglesdownwardly, as at 4, forming an escutcheon for the louver operating rod,which will be described later. The major portion of the entire structureis understood to be formed of suitable sheet material, or the like, forthe purpose. This central body portion is provided with a single throughrectangularly shaped opening 5, through which ventilation is controlledby pivotally adjustable louvers, as at 6, in this instance, there beingbut two of such shown, though obviously any number may be provided.

Within the flanges 2 and 3 of this body portion I and extending fromeither end thereof (though but one end is illustrated in the drawing) isa frame-like structure including the portions 6, I, 8 and 9; theportions 1 and 9 being horizontally disposed flanges which fit snuglythough slidably within the flanges 2 and 3 of the body portion. Theportion 6 of the end extension has an opening therethrough indicated atI0 so that the horizontal extent of the portion 6 does not exceed thedistance between the adjacent end of the body portion I and the end IIof the frame-like wall III2 about the opening 5 of the central portionI; this being to permit of the telescopic end being slid inwardly so asto not project beyond the longitudinal limits of the central portion.However, to compensate for an extension of the device to accommodate anabnormally wide opening, which would necessitate the movement of theextendible portions to such an extent that an opening such asillustrated at IIl would occur between the innermost edge of the member6 and the adjacent end of the body por tion I, there is provided theslidable wall member I3 carried intermediate of the flanges I and 9 ofthe extendible portion. This member I3 is the width only of the member 6so that it may be retained therein when the extensions are fully 10telescoped, and the member I3 may be slid to cover the opening I0, thusproviding a closed wall the full length of the ventilator when in itsfully extended position. It will be noted that the flanges I and 9 areof U-shaped construction at 15 device. It will be noted, too, that thismember 20 I3 is provided with marginal flanges for convenientmanipulation by the fingers of the operator.

The walls I I and I2 about the opening 5 of the central portion arepreferably of a depth equal to approximately the width of the flanges 2and 25 3 as well as the members I4 so that the latter preferably restupon the upper and lower wall I2, and the edges of the walls II and I2are provided with bead like grooves or folds indicated I at I5 and I6into which may be pressed the edges 30 of any kind of suitable screeningindicated at IT so that the passageway of the ventilator is screenedupon its innermost side and provided with louvers on the outer side.

These louvers and their adjustment are novel 5 in that the louvers areof inverted L-shape each having a flange I8 disposed at right angles tothe portion indicated at 6, and which latter portions have stepped oroffset edges I9 to overlap each other as well as the lower oneoverlapping 49 the lower edge of the opening 5 to make a tight surfacewhen closed. As support for the louvers there are simply formed slotsindicated at 20 in the ends of the opening 5 where the louvers are to bepivotally suspended, and the innermost 5 edges of the portions I8 of thelouvers being stepped as at 2| and extending considerably beyond theportion 6' (see Fig. 2), thus providing an exceedingly simple pivotalmounting for the louvers, it being noted that the upperlip of the 50slots 20 are slightly arcuate in form.

The operating device of the louvers comprises the rod 22 extendingthrough the portions I8 of the louvers and which rodis mounted withinshort pieces 23 of tubing intermediate the louver 55 as well as betweenthe uppermost louver and the right angularly bent handle 24 of the rodto insure proper simultaneous movement or the louver when adjusted,there being installed between the portion ll the lowermost louver andthe flange I! an expansive helical spring 25.

As a selective holding means for the handle 24 of the rod I haveprovided the notched escutcheon 4, previously referred to, so that thehandle may be slipped either one way or the other into any one of thenotches 26 to insure its remaining in any one of the four adjustedpositions illustrated, it being wholly removable as desired by drawingthe same upwardly through the hole 21.

Having thus described my invention, what I claim and desire to secure byLetters Patent, is:

l. A combined ventilator and screen for window openings comprising acentral body portion having a central rectangular opening therethrough,telescopic extensible portions within opposite ends of said bodyportion, operable overlapping louvers within said central opening andnormally covering said opening, a vertically adjustable rod extendingthrough portions of said louvers for operating same, a springsurrounding said rod for normally holding the louvers closed and ascreened frame structure about said opening upon the inner wall of theventilator.

2. A ventilator for window openings compris of air passage therethrough,characterized by the pivotal support of the louvers consisting only ofslots in the marginal edges of said opening and extensions at thecorners oi! either end of said louvers for holding same pivotally withinsaid slots, a spring biased rod extending through portions of saidlouvers for operating same, said rod being biased by said spring to holdsaid louvers in closed position.

4. A ventilator oi the character described having a central bodyportion, an extensible portion telescopically mounted within the end ofsaid 7 body portion and overlapping same a predetermined extent whenfully retracted, and a wall member slidable within said extensibleportion for selective use in covering an opening formed by extension ofsaid telescopic portion greater than the width oi. said overlappingportion.

ERNEST A. JOHNSON.

